Sony Discman D-50MkII Service Manual page 34

Note on Schematic Diagram:
e@ All capacitors are in uF unless otherwise noted. pF: wuF
SOWV or less are not indicated except for electrolytics
and tantalums.
e@ All resistors are in Q and % W or less unless otherwise
specified.
mae «© signal path.
Components for right channel have same values as for left
channel. Reference numbers are coded from 200.
A : internal component.
wma © B+ bus,
=m : B— bus.
[-_] : adjustment for repair.
Voltages, waveform and total current are measured with
top panel closed.
Power voltage is DC 9 V and fed with regulated de power
supply from DC in 9 V (external power voltage) jack.
Voltages are DC with respect to ground in service mode.
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark: stop mode
( ) : play mode
@ Waveforms are taken to ground in service mode by using
oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
Total current is measured in service mode.
e Switch
[Ret no [Swen | Penton |
POWER
LASER ON
LIMIT
a 7 OPEN/CLOSE
PLAY-MODE
REMAIN/ENTER
KEY-MODE
PE (PLAY/PAUSE)
bP (FF)
Ki (FR)
m= = (STOP)
See page 7 — 9 for setup of service mode.
Note: The components identified by shading and mark
are critical for safety. Replace only with
Note: Les composants identifies par un trame et une
marque /\ sont critiques pour la sécurité. Ne les
remplacer que par une piece portant le numéro
specif
=z °o .
ONAH PWrHE |
Part No.
4-912-641-01
X-4907-027-1
4-908-711-01
X-4907-028-1
X-4907-028-2
4-912-643-01
3-703-709-00
4-907-030-11
4-907-031-01
_ SECTION 5
EXPLODED VIEWS AND PARTS LIST
NOTE:
+ The mechanical parts with no reference
number in the exploded views are not
supplied.
* Items marked " * " are not stocked since
they are seldom required for routine
service. Some delay should be antici-
pated when ordering these items.
* The construction parts of an assembled
part are indicated with a collation
number in the remark column,
Description Remarks
FOOT, RUBBER
PANEL ASSY, BOTTOM
LABEL, CAUTION, LENS
PANEL ASSY, TOP(SERIAL No.10001-25000)
PANEL ASSY, TOP(SERIAL No.25001 AND LATER)
HINGE
STICKER, SONY SYMBOL (15)
PLATE, FULCRUM
BAR, FULCRUM
No.
10
ll
12
13
14
15
The components identified
by shading and mark A are
critical for safety.
Replace only with part
number specified.
Part No.
X-4907-023-1
*4-885-838-01
3-703-816-62
3-703-816-42
3-703-816-02
3-527-213-00
*3-701-999-00
4-913-805-01
4-913-871-01
Description
Les composants identifiés par
une trame et une marque A sont
critiques pour la sécurité.
Ne les remplacer que par
une pi@ce portant le numéro
spécifié.
15
Remarks
RETAINER ASSY, SPRING
(AEP, UK, DUTCH) ---LABEL, CLASS 1
SCREW (M1.4X2.2), SPECIAL HEAD
SCREW (M1.4X2.5), SPECIAL HEAD
SCREW (M1.4X2.0), SPECIAL HEAD
(Canadian, AEP ,UK, E, AUS, DUTCH)
+. sLABEL, SERIAL NUMBER
(US)........LABEL, SERIAL NUMBER
(AEP ,UK,E,AUS)...LABEL, MODEL NUMBER
(DUTCH) «..++++~LABEL, MODEL NUMBER